Tuesday's TV highlights: 'The Middle' on ABC

On Sue's (Eden Sher, left) 21st birthday, Frankie (Patritia Heaton) takes her to a bar to celebrate in a new episode of the final season of the family comedy "The Middle" on ABC. (Michael Ansell / ABC)

SERIES

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NCIS McGee (Sean Murray) has a new houseguest, a convicted murderer (guest star French Stewart, “3rd Rock From the Sun”) who was given a 48-hour furlough in exchange for information about his former cellmate (guest star Graham Hamilton), a killer fugitive pursued by Gibbs and Fornell (Mark Harmon, Joe Spano). Pauley Perrette and Maria Bello also star. 8 p.m. CBS

The Flash DeVoe’s (guest star Sugar Lyn Beard) crusade might be stopped by Barry (Grant Gustin), as long as he can secure the help of a powerful woman. Jesse L. Martin, Tom Cavanagh, Danielle Panabaker, Candice Patton and Carlos Valdes also star. 8 p.m. KTLA

The Middle Sue (Eden Sher) turns 21 and Frankie (Patricia Heaton) takes her to a bar to celebrate. Neil Flynn, Atticus Shaffer and Charlie McDermott also star in this new episode. 8 p.m. ABC

Lethal Weapon Swoosie Kurtz continues her guest role on this show as a new friend of Riggs (Clayne Crawford). Damon Wayans Sr., Kevin Rahm and Keesha Sharp also star, with guest star Wallace Langham. 8 p.m. Fox

We'll Meet Again A man searches for a childhood friend who encouraged him to come out in the season finale. 8 p.m. KOCE and KPBS

The Fosters Stef (Teri Polo) decides to have a candid talk with Lena (Sherri Saum) about what has been troubling her in this new episode. 8 p.m. Freeform

This Is Us Kate and Toby (Chrissy Metz, Chris Sullivan) are headed for Las Vegas in this new episode, and in a flashback, Jack and Rebecca (Milo Ventimiglia, Mandy Moore) mark an anniversary. Sterling K. Brown, Justin Hartley and Susan Kelechi Watson also star. 9 p.m. NBC

Black Lightning Jefferson (Cress Williams) is determined to find his father’s killer, while Anissa (Nafessa Williams) tries to use her newly found abilities to set something right in this new episode. 9 p.m. KTLA

Unsolved: The Murders of Tupac and the Notorious B.I.G. One of several TV projects examining the still-unsolved deaths of the two rap music icons, this new scripted series spans two decades as it explores the complicated and turbulent friendship of Tupac Shakur and Christopher “Biggie Smalls” Wallace (Marco Rose, Wavyy Jones), and the extended police investigations into their two homicides, which took place within six months of each other. Josh Duhamel, Bokeem Woodbine and Jimmi Simpson also star. 10 p.m. USA

The Detour Nate (Jason Jones) fully expects a hero’s welcome when he returns home after an exhausting and challenging winter at sea, but he is left stranded at the dock by his family in this new episode. Natalie Zea, Ashley Gerasimovich and Liam Carroll also star. 10:30 p.m. TBS

SPECIALS

American Creed Former Secretary of State Condoleezza Rice and historian David M. Kennedy are among the participants offering views on the current status of opportunity and equality in the United States, in writer-producer-director Sam Ball’s new documentary. 9 p.m. KOCE and KPBS